12 5/16" x 12 5/16" x 40" Outer Lamp Boxes. These cartons are adjustable to provide a custom fit for hard to pack, fragile items like lamps, mirrors and artwork. Combine with Inner Lamp Box INNERLAMP (sold separately) to make a set. Cartons are printed with fragile warning and this side up arrows and feature a convenient write on destination panel for deliver to instructions. Manufactured from 200#/ECT-32 kraft corrugated. Sold and shipped flat in bundle quantities.